3 years ago

2. An advertiser wants to find convincing evidence that television viewers

Mathematics

1 answer:

iogann1982 [59]3 years ago

5 0

Answer:

Step-by-step explanation:

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Solve linear equation 1/4 x + 18 = X

Anton [14]

Answer:

Step-by-step explanation:

1 / 4 x + 18 = x

x / 4 + 18 = x

x = x / 4 + 18

x - x / 4 = 18

( 4x / 4 ) - ( x/4 ) = 18

( 4x - x ) / 4 = 18

3x / 4 = 18

3x = 18 * 4

x = ( 18 * 4 ) / 3

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x = 24

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Describe how to use a tens fact to find the difference for 15-8

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When you use a tens fact you round to the nearest ten and 15-8=7. The nearest ten to seven is 10
Answer:10

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3 years ago

Easy question right here!

Bad White [126]

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3 years ago

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Talja [164]

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6 and 4

Step-by-step explanation:

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The average college lecture hall (auditorium) can seat 60 students with a standard deviation of 21. Assume that a total of 60 le

fiasKO [112]

Answer:

The standard deviation of the sample mean is $\sigma _ {\= x } = 2.711$

Step-by-step explanation:

From the question we are told that

The mean is $\= x = 60$

The standard deviation is $\sigma = 21$

The sample size is $n = 60$

Generally the standard deviation of the sample mean is mathematically represented as

$\sigma _ {\= x } = \frac{\sigma }{\sqrt{n} }$

substituting values

$\sigma _ {\= x } = \frac{ 21 }{\sqrt{60} }$

$\sigma _ {\= x } = 2.711$

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3 years ago